TD-LTE中下行MIMO技术QRM-MLD信号检测算法

QRM-MLD Signal Detection Algorithm Based on Downlink MIMO in TD-LTE System

MIMO技术是LTE系统中的一个关键技术,在实际应用中,下行MIMO信号检测算法的选用需要在计算复杂度和系统性能之间取得合理折中。主要对QRM-MLD检测算法及其优化方案进行了分析与研究,同时结合ML算法仿真比较。结果表明,对于QRM-MLD算法,随M的增大,检测性能提高,同时计算复杂度也增大。在相同计算复杂度下,QRM-MLD优化方案的性能明显优于一般方案,是一种有效的MIMO检测算法。

MIMO is a key technology of TD-LTE system. The selection of downlink algorithm need to strike a reasonable balance between the computational complexity and the system performance in real application. The QRM-MLD detection algorithm and its optimized scheme are mainly analyzed and the ML algorithm are compared with. Simulation results show that with the M increase, the QRM-MLD detection performance is improved while the computational complexity also increased. At the same computational complexity, the QRM-MLD optimization scheme＇ s performance is better than the general scheme significantly. So the optimized scheme is an effective MIMO detection algorithm.